//equality vs assignment
#include<iostream>
int main()
{
    using namespace std;
    int quizscores[10]={20,20,20,20,20,19,20,18,20,20};

    cout << "Doing it right :\n";
    int i;
    for(i = 0;quizscores[i] == 20;i++)
        cout << "quiz " << i << " is a 20 \n";
    //Waring :you may prefer reading about this program to actually running it.
    cout<<"Doing it dangerously wrong:\n";
    for(i = 0;quizscores[i] == 20 ;i++)
        cout << "quiz " <<i << " is a 20 \n";
    return 0;
}
